Austin's Mold: Is Cedar Fever Hiding AC Asthma?

By Franklin Everett Shaw

March 1, 2026

The air in Austin hangs heavy, thick with the promise of cedar pollen. But is that persistent cough and itchy throat really cedar fever, or could something else be lurking in your home, specifically in your AC unit? Many Austinites mistake mold-related asthma, triggered by mold growth in air conditioning systems, for cedar fever. This confusion can lead to ineffective treatment and prolonged suffering. Let’s break down how to tell the difference and, more importantly, what you can do about it.

First, let’s differentiate between cedar fever and mold-related AC asthma. Cedar fever, an allergic reaction to mountain cedar pollen, typically presents with a runny nose, itchy eyes, sneezing, fatigue, and sometimes a mild sore throat. Mold-related AC asthma, on the other hand, often involves wheezing, shortness of breath, chest tightness, and a persistent cough, especially when the AC is running. The key difference lies in the type of symptoms and their timing. Cedar fever symptoms tend to be seasonal, peaking during the winter months when cedar pollen counts are high. AC asthma symptoms are often more consistent, worsening when the AC is in use, regardless of the season.

So, you suspect mold. What’s next? Time for some detective work. A systematic approach to identifying indoor mold is crucial. Start with a visual inspection. Check areas with high humidity: bathrooms, kitchens, and, most importantly, around your AC unit and vents. Look for discoloration, staining, or visible mold growth. Don’t just focus on the obvious; mold can hide behind wallpaper, under carpets, and inside walls. Sniff around. A musty odor is a telltale sign of mold, even if you can’t see it. Pay close attention to the air coming from your AC vents.

Now, let’s get practical. You’ve found some mold. What can you do yourself? For small areas (less than 10 square feet), DIY mold remediation is often effective. The key is to kill the mold and prevent it from returning. Here’s a step-by-step guide:

1. Safety First: Wear gloves, a mask (N-95 or higher), and eye protection. Mold spores can irritate your skin, lungs, and eyes.
2. Ventilate: Open windows and doors to ensure proper ventilation. This helps to dry out the area and prevent the spread of spores.
3. Clean: Use a solution of bleach and water (1 part bleach to 10 parts water) or a commercial mold cleaner. Apply the solution to the affected area and scrub thoroughly.
4. Dry: After cleaning, dry the area completely. Use a fan or dehumidifier to speed up the process. Mold thrives in damp environments.
5. Monitor: Keep an eye on the area for any signs of regrowth. If the mold returns, repeat the cleaning process or consider professional help.

A common mistake is simply wiping away the visible mold without addressing the underlying moisture problem. This is like mowing weeds without pulling them out by the roots. The mold will inevitably return. Another pitfall is using the wrong cleaning solution. Avoid ammonia-based cleaners, as they can react with bleach to create toxic fumes. Always test your cleaning solution in an inconspicuous area first to ensure it doesn’t damage the surface.

But when is professional mold removal necessary? If the mold covers a large area (more than 10 square feet), if you have persistent respiratory problems, or if you’re unsure about the type of mold, it’s best to call in the professionals. Mold remediation companies have the expertise and equipment to safely and effectively remove mold and address the underlying moisture issues. They can also identify the type of mold, as some species are more toxic than others. In Austin, consider companies like Mold Remediation of Austin or Austin Mold Tech.

Let’s talk about your AC. Regular AC maintenance is crucial for preventing mold growth. Change your air filters regularly, at least every three months, or more often if you have pets or allergies. Consider using a higher-MERV filter to trap more mold spores and allergens. Schedule annual AC tune-ups with a qualified technician. They can clean the coils, check for leaks, and ensure proper drainage. A clogged drain line can create a breeding ground for mold.

Filtration is key, especially in Austin, with its unique blend of allergens. HEPA filters are highly effective at trapping mold spores, pollen, and other airborne particles. Consider investing in a HEPA air purifier for your home, especially for bedrooms and living areas. For your AC system, look for filters with a MERV rating of 11 or higher. These filters can capture smaller particles than standard filters.

Finally, don’t hesitate to seek professional help for allergy and asthma testing. Several clinics in Austin offer comprehensive allergy testing, including skin prick tests and blood tests. These tests can help identify your specific allergens and guide your treatment plan. Austin Allergy & Asthma Clinic and Allergy & Asthma Center of Austin are two reputable options. A pulmonologist can diagnose and manage asthma, providing you with the necessary medications and strategies to control your symptoms.

Ignoring potential mold issues can have serious consequences for your respiratory health. Don’t dismiss that persistent cough as “just cedar fever.” Take proactive steps to identify and address mold in your home, especially in your AC system. By understanding the difference between cedar fever and mold-related asthma, implementing effective DIY remediation techniques, and seeking professional help when needed, you can breathe easier and enjoy a healthier home in Austin. Remember, a little vigilance goes a long way in protecting your lungs.